ref: 661014367bfb98e6b30bb4a804c9575d59bdf638
dir: /src/pitchdetection.c/
/*
Copyright (C) 2003 Paul Brossier
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "aubio_priv.h"
#include "sample.h"
#include "phasevoc.h"
#include "mathutils.h"
#include "filter.h"
#include "pitchmcomb.h"
#include "pitchyin.h"
#include "pitchfcomb.h"
#include "pitchschmitt.h"
#include "pitchdetection.h"
typedef smpl_t (*aubio_pitchdetection_func_t)(aubio_pitchdetection_t *p,
fvec_t * ibuf);
typedef smpl_t (*aubio_pitchdetection_conv_t)(smpl_t value,uint_t srate,uint_t bufsize);
void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf);
struct _aubio_pitchdetection_t {
aubio_pitchdetection_type type;
aubio_pitchdetection_mode mode;
uint_t srate;
uint_t bufsize;
/* for mcomb */
aubio_pvoc_t * pv;
cvec_t * fftgrain;
aubio_pitchmcomb_t * mcomb;
aubio_pitchfcomb_t * fcomb;
aubio_pitchschmitt_t * schmitt;
aubio_filter_t * filter;
/* for yin */
fvec_t * buf;
fvec_t * yin;
aubio_pitchdetection_func_t callback;
aubio_pitchdetection_conv_t freqconv;
smpl_t yinthres;
};
/* convenience wrapper function for frequency unit conversions
* should probably be rewritten with #defines */
smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize){
return aubio_freqtobin(f,srate,bufsize);
}
smpl_t freqconvmidi(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvmidi(smpl_t f,uint_t srate,uint_t bufsize){
return aubio_freqtomidi(f);
}
smpl_t freqconvpass(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvpass(smpl_t f,uint_t srate,uint_t bufsize){
return f;
}
aubio_pitchdetection_t * new_aubio_pitchdetection(uint_t bufsize,
uint_t hopsize,
uint_t channels,
uint_t samplerate,
aubio_pitchdetection_type type,
aubio_pitchdetection_mode mode)
{
aubio_pitchdetection_t *p = AUBIO_NEW(aubio_pitchdetection_t);
p->srate = samplerate;
p->type = type;
p->mode = mode;
p->bufsize = bufsize;
switch(p->type) {
case aubio_pitch_yin:
p->buf = new_fvec(bufsize,channels);
p->yin = new_fvec(bufsize/2,channels);
p->callback = aubio_pitchdetection_yin;
p->yinthres = 0.2;
break;
case aubio_pitch_mcomb:
p->pv = new_aubio_pvoc(bufsize, hopsize, channels);
p->fftgrain = new_cvec(bufsize, channels);
p->mcomb = new_aubio_pitchmcomb(bufsize,channels,samplerate);
p->filter = new_aubio_cdsgn_filter(samplerate);
p->callback = aubio_pitchdetection_mcomb;
break;
case aubio_pitch_fcomb:
p->buf = new_fvec(bufsize,channels);
p->fcomb = new_aubio_pitchfcomb(bufsize,hopsize,samplerate);
p->callback = aubio_pitchdetection_fcomb;
break;
case aubio_pitch_schmitt:
p->buf = new_fvec(bufsize,channels);
p->schmitt = new_aubio_pitchschmitt(bufsize,samplerate);
p->callback = aubio_pitchdetection_schmitt;
break;
default:
break;
}
switch(p->mode) {
case aubio_pitchm_freq:
p->freqconv = freqconvpass;
break;
case aubio_pitchm_midi:
p->freqconv = freqconvmidi;
break;
case aubio_pitchm_cent:
/** bug: not implemented */
p->freqconv = freqconvmidi;
break;
case aubio_pitchm_bin:
p->freqconv = freqconvbin;
break;
default:
break;
}
return p;
}
void del_aubio_pitchdetection(aubio_pitchdetection_t * p) {
switch(p->type) {
case aubio_pitch_yin:
del_fvec(p->yin);
del_fvec(p->buf);
break;
case aubio_pitch_mcomb:
del_aubio_pvoc(p->pv);
del_cvec(p->fftgrain);
del_aubio_pitchmcomb(p->mcomb);
break;
case aubio_pitch_schmitt:
del_fvec(p->buf);
del_aubio_pitchschmitt(p->schmitt);
break;
case aubio_pitch_fcomb:
del_fvec(p->buf);
del_aubio_pitchfcomb(p->fcomb);
break;
default:
break;
}
AUBIO_FREE(p);
}
void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf){
uint_t i,j = 0, overlap_size = 0;
overlap_size = p->buf->length-ibuf->length;
for (i=0;i<p->buf->channels;i++){
for (j=0;j<overlap_size;j++){
p->buf->data[i][j] =
p->buf->data[i][j+ibuf->length];
}
}
for (i=0;i<ibuf->channels;i++){
for (j=0;j<ibuf->length;j++){
p->buf->data[i][j+overlap_size] =
ibuf->data[i][j];
}
}
}
void aubio_pitchdetection_set_yinthresh(aubio_pitchdetection_t *p, smpl_t thres) {
p->yinthres = thres;
}
smpl_t aubio_pitchdetection(aubio_pitchdetection_t *p, fvec_t * ibuf) {
return p->freqconv(p->callback(p,ibuf),p->srate,p->bufsize);
}
smpl_t aubio_pitchdetection_mcomb(aubio_pitchdetection_t *p, fvec_t *ibuf) {
smpl_t pitch = 0.;
aubio_filter_do(p->filter,ibuf);
aubio_pvoc_do(p->pv,ibuf,p->fftgrain);
pitch = aubio_pitchmcomb_detect(p->mcomb,p->fftgrain);
/** \bug should move the >0 check within aubio_bintofreq */
if (pitch>0.) {
pitch = aubio_bintofreq(pitch,p->srate,p->bufsize);
} else {
pitch = 0.;
}
return pitch;
}
smpl_t aubio_pitchdetection_yin(aubio_pitchdetection_t *p, fvec_t *ibuf) {
smpl_t pitch = 0.;
aubio_pitchdetection_slideblock(p,ibuf);
pitch = aubio_pitchyin_getpitchfast(p->buf,p->yin, p->yinthres);
if (pitch>0) {
pitch = p->srate/(pitch+0.);
} else {
pitch = 0.;
}
return pitch;
}
smpl_t aubio_pitchdetection_fcomb(aubio_pitchdetection_t *p, fvec_t *ibuf){
aubio_pitchdetection_slideblock(p,ibuf);
return aubio_pitchfcomb_detect(p->fcomb,p->buf);
}
smpl_t aubio_pitchdetection_schmitt(aubio_pitchdetection_t *p, fvec_t *ibuf){
aubio_pitchdetection_slideblock(p,ibuf);
return aubio_pitchschmitt_detect(p->schmitt,p->buf);
}